West Bromwich Albion stretched their unbeaten run to seven games as John Swift's second-half penalty earned the Championship play-off hopefuls a point at Millwall.
Millwall were ahead on 21 minutes when Duncan Watmore found himself in the clear, before clipping home a confident right-foot finish from the edge of the box as Albion keeper Alex Palmer came off his line.
It was only Watmore's fifth goal for the Lions since being signed from Sunderland by then-Millwall boss Gary Rowett on transfer deadline day in January 2023.
But the Baggies levelled when an innocent-looking challenge by Joe Bryan in the right corner of the penalty area on Grady Diangana left the Albion midfielder down on the grass.